JP2002511539A - Manhole cover support device - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention is an apparatus for supporting manhole covers and the like, comprising an upper frame member (1) formed to receive a lid, wherein the surrounding road pavement (10) is provided. , 11), wherein the holding member is provided on the frame member (1), and further includes a connection member (40) movable with respect to the upper frame member (1). An anchoring member (20) between the connecting member (40) and the frame member (1) and optionally one or more adjusting rings (30), preferably made of an elastically deformable material, and The member (20) and the adjusting ring (30) are each provided with annular grooves (22, 32), in which the connecting members (40) are inserted, creating a connection allowing displacement, thereby simplifying the structure. Can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a manhole cover support device according to the preamble of claim 1.

[0002] Conventional manhole covers for sewers or the like consist primarily of tubular members, with a frame member used to receive the lid mounted on top of those members. In the case of rainwater sewers, such lids are perforated, whereas in the case of sewage sewers, they are provided with substantially closed lids. At its lower end there is a manhole leading to a normally horizontal sewer. Horizontal or vertical movements can occur due to temperature fluctuations, especially freezing, and also from other effects on the road infrastructure. Road traffic also places a significant load. Conventional rigid manhole structures cannot of course move along with these movements, or they are insufficient if at all.
On the one hand, this results in damage to the individual components and, on the other hand, a situation in which the lid is no longer flush with the road surface. This is a major obstacle and dangerous for road traffic. Appropriate repairs and replacements are relatively expensive.

[0003] In a manhole cover structure known from WO 82/04276, a frame member for the manhole cover is fixed to the upper layer of a roadbed by a carota-like holding part. The frame member has a downwardly projecting sleeve on its lower side, which sleeve surrounds the manhole tube with play and allows some axial movement. Ground level fluctuations caused by freezing can be partially absorbed in this way. However, if the position changes parallel to the road surface along with the height change,
Such a displacement cannot be absorbed by this structure. In addition, the tube to be slid in the sleeve cannot be moved, so that it cannot perform a predetermined function.

[0004] Furthermore, the housing of the water shut-off cock known from British Patent Publication GB2194981A consists of a base plate, a grooved tube and an upper part supporting the lid.
This grooved tube is mainly responsible for improving the fixing to the ground in order to prevent unacceptable loads on the tube in the case of the maintenance manhole. The upper portion is provided to surround the tube, but is not connected to the tube, and the tube extends freely through the upper portion. Such a structure may be suitable for maintenance manholes for water supply valves and the like, but is generally not usable, for example, as a sewer cover structure. In addition, as described in the prior art section of this specification, in the case of grooved plastic tubing, a tube that is rigid enough to withstand the ground load is sufficient to absorb any ground movement that may occur. There is always the problem of not having a flexible structure. Conversely, if the tube is made sufficiently flexible to solve this problem, there will be a problem of insufficient rigidity, and there will be concerns that the manhole will be weakened by road traffic.

[0005] Furthermore, in the case of the manhole cover structure known from the Swedish patent publications SE403919A and SE384238A, the manhole cover is provided with a member that can be pulled out in a telescopic manner. According to such a telescope type guide mechanism, the height fluctuation of the manhole cover with respect to the member fixed to the ground can be adjusted, but the positional displacement in the radial direction causes a problem. Furthermore, with such a mechanism, it is not always easy to create a slope of the mounting position relative to a slope on a road or the like.
In addition, there is a danger that the telescopic slide will get caught and cause malfunction.

The object of the present invention is to avoid such drawbacks and to further improve the manhole cover structure so that even with severe temperature fluctuations, freezing, intense road traffic or the like, the lid may not contact the road surface. This is to ensure that a flush posture is always guaranteed. At that time, it is desired that the manhole cover structure can be easily and inexpensively manufactured. Also, we want to be able to be used for various applications in a wide range even with a small number of parts. In particular, it is desired that not only the displacement in the vertical direction but also the displacement in the radial direction can be adjusted and compensated to some extent.

In the present invention, these problems are solved by the features of the first aspect.

It is important to the invention not only to provide a telescopic mechanism of the various components, but also to make them flexible within a certain range so that they can move to some extent with the movement and compression of the ground. Is to have sex. Preferably, the anchor member and the adjustment ring are made of a suitable plastic material. A particular advantage of the present invention is that an appropriate number of adjustment rings can be selected depending on the height required for this mechanism. In the smallest embodiment, the anchor member rests directly on the connecting member. If a higher height has to be created, the required number of adjusting rings are inserted between the connecting member and the anchor member. In this way, only three different parts need to be stocked for the flexible part, which simplifies the adjustment operation and reduces the production costs. The flexible structure of these rings not only allows adjustment of axial displacements, but also absorbs and adjusts displacements in other directions. In particular, according to the structure of the present invention, the deviation of the angle between the anchor member and the connecting member on the slope is allowed.

[0009] It is particularly advantageous if the connecting member has at least one retaining claw at its upper end, which is adapted to engage a corresponding lack of an anchor member or an adjusting ring. In this way, the mounting is greatly simplified, since the connecting element and the anchor element or possibly the adjusting ring thereon can be interconnected without separation. In this case, the individual rings can be inserted and engaged and connected, but it is also possible to connect them by twisting in a bayonet connection manner.

As a particularly advantageous embodiment, it is proposed to integrally mold an upwardly facing dish-shaped projection on the outer periphery of the anchor member. According to this configuration, the anchor member is securely embedded in the surrounding ground, and is not prevented from responding to a proper movement.

A particularly good connection between the adjusting rings or between the adjusting ring and the anchor member is achieved by the adjusting ring being provided with two concentric grooves in its upper region.

A solution is known in which the frame member, ie the uppermost member into which the sewer lid is incorporated, comprises an anchor member flush with the road surface. However, it has proven to be much more convenient when the anchor member is fixed slightly below the road surface and is surrounded by the road pavement from all directions and is retained on the road pavement.

In order to be able to raise the sewer lid as easily as possible after additional road pavement, an intermediate ring is provided, in particular for mounting on a frame member, on which an outwardly extending anchor ring is provided. Should be provided. According to the invention, the intermediate ring can be of various thicknesses. Depending on the thickness of the additionally constructed road pavement, the insertion of one or more intermediate rings allows the sewage lid to be raised accordingly.

The bellows can reliably prevent soil or stone from penetrating into the mutually moving members. The adjusting ring contributes to the reinforcement of the bellows in such a solution and can support the bellows against the ground. However, it is also possible to insert a steel ring to reinforce the bellows itself. In another possible variant, these rings can be surrounded by a membrane to provide protection against the ingress of foreign objects.

The present invention will be described below in detail with reference to the drawings showing the embodiment.

The upper frame member 1 is configured to receive a lid not shown in FIG. The frame member 1 includes an anchor member 20 having two concentric ring portions 21.
And a ring-shaped notch 22 is formed between the ring portions. The dish-shaped projection 23 facing outward in the radial direction is provided in the surrounding road substructure 10.
b, that is, for supporting the anchor member 20 with respect to the roadbed. Below the anchor member 20 is arranged an adjusting ring 30, which also comprises two ring portions 31 of a similar configuration, between which a ring-shaped recess 32 is formed. The ring portion 41 of the connecting member 40 is engaged in the recess 32, the connecting member resting only partially on the manhole ring 50 shown.

An intermediate ring 9 is additionally provided which can be inserted into the frame member 1 so that the frame member 1 does not have to be removed when the road pavement 11 is constructed. If necessary, a second thinner intermediate ring 9a can be additionally mounted, so that it is exactly level with the road surface 51.

FIG. 2 shows the individual components of the device according to the invention in an exploded form in an enlarged view. The anchor member 1 is provided with an anchor member 15 substantially at the center of the outer periphery thereof, in which a hole 16 is formed to create a holding member as referred to in the present invention. This makes it possible to reliably hold the anchor member 1 on the surrounding road pavement 10a.

In addition, another intermediate ring 9b of different height is shown in the upper part of FIG. 2, together with the intermediate rings 9 and 9a already described. Since the height of the intermediate rings 9a and 9b is low, it is not possible to provide a missing portion for receiving the lid like the ring 9, so that it is the same height as the ring 9a or 9b and on the mounting support of the sewer lid. Spacer rings 9aa and 9bb to be mounted are prepared.

With intermediate rings, for example 2, 3, and 7 cm high, only two intermediate rings need to be used, and any pavement of road pavement, usually in the range of 2 to 10 cm or more, at 1 cm intervals. Height can be covered. This minimizes the required inventory, even if it is as adaptable as possible to all possible situations.

The connecting member 40 has a holding claw 42 at the upper end of the ring portion 41. The pawl 42 engages with the notch 34 formed in the ring portion 31 of the adjustment ring 50. In the case of mounting without the adjustment ring 30, the pawl 42 is attached to the ring portion 21
Into the lacking portion 24 formed at the bottom.

In a lower region of the connecting member, the manhole ring 50 is securely placed.
A centering ring 46 is formed. The outwardly projecting projection 47 serves to receive the ground pressure so that the connecting member 40 maintains its position.

As further evident from FIG. 2, a recess 35 is provided in the upper region of the adjustment ring 30 for receiving the tip of the ring portion 21 of the anchor member 20.

FIGS. 3 and 4 show a variant of the intermediate ring, designated 9 a ′.
The difference from the intermediate ring 9a in FIG. 2 is that a holding protrusion 59 is provided on the outer peripheral portion to improve the anchoring ability of the intermediate ring 9a '.

In the case of the embodiment of the present invention shown in FIG. 5, a bellows 4 is provided between the frame member 1 having the mounting ring 3 and the connecting member 6. The bellows 4 is an assembly of frustoconical parts, which are connected alternately in opposite directions and are reinforced by a steel ring 5. An adjustment ring, not shown in FIG. 5, can be provided inside the bellows 4. The bellows 4 can reliably prevent foreign matter from entering.
FIG. 2 shows a manhole cover, and FIG. 7 shows a holding frame.

FIGS. 6 to 8 illustrate the operation of the present invention. FIG. 6 shows the anchor member 20.
, The adjustment ring 30 and the connection member 40 are shown in an arrangement, with these parts being pushed deep into one another. At this time, the adjustment ring 30 is firmly held by the anchor member 20 and the pawl 36 of the adjustment ring 30 is
Of the two members 20 and 30
Are tightly interconnected. However, the connecting member 40 is inserted deeply into the adjustment ring 30, but the claw 42 is separated from the stopper 38 of the adjustment ring 30. FIG. 7 shows, in contrast, the opposite situation, in which the individual parts are pulled out of each other as far as possible. In this case, unlike FIG. 6, the pawl 42 of the connecting member 40 is in contact with the stopper 38 of the adjustment ring 30.

It is clear from FIG. 8 that the anchor member 20 can be placed obliquely with respect to the connecting member 40. Here, a state where the adjustment ring is not used is shown. In the left half of FIG. 8, the anchor member 20 has been lowered to the maximum so that the lower region of the stopper 28 directly contacts the connecting member 40. However, on the opposite side, the pawl 42 and the stopper 28 are engaged. In this manner, in the case of the embodiment of FIG.

According to the device of the present invention, a sewer frame structure that is always flush with the road surface can be produced at low cost. The device can be installed quickly and inexpensively, and can be adapted quickly and inexpensively to new road heights, even when renovating or updating road pavements. The present invention is suitable for newly establishing manholes and renovating existing manholes.

[0029] Since the original frame member 1 is attached immediately before the road pavement is constructed, simple ground leveling is possible, and the anchor member 20 can be made substantially flush with the surface of the road substructure. The work with the corresponding vibrators and rollers is therefore almost unlimited by the presence of manholes. The device according to the invention is water-tight, freezing-resistant, heat-resistant and relatively light in weight.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the device according to the invention in a mounted state.

FIG. 2 is an exploded view of the individual components that make up the device according to the invention.

FIG. 3 is a plan view of a modification of the intermediate ring according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view of another modified example of the present invention.

FIG. 6 is a sectional view illustrating the operation of the present invention.

FIG. 7 is a sectional view illustrating the operation of the present invention.

FIG. 8 is a sectional view illustrating the operation of the present invention.

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] June 26, 2000 (2000.6.26)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

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Claims (10)

[Claims] An apparatus for supporting manhole covers and the like, comprising:
An upper frame member (1) formed to receive the lid, wherein a holding member is provided on said frame member (1) for fastening in the surrounding road pavement (10, 11); Further, a connecting member (40) movable with respect to the upper frame member (1).
An anchoring member (20) between the connecting member (40) and the frame member (1) and, if necessary, one or more adjusting rings (30) made of preferably elastically deformable material.
And the anchor member (20) and the adjustment ring (30) each have annular grooves (22, 32) into which the connecting members (40) are inserted to create a connection allowing displacement. An apparatus characterized in that: 2. The connecting member (40) is provided at its upper end with a retaining claw (42) which engages in a corresponding missing part of the anchor member (20) or the adjusting ring (30). The apparatus according to claim 1, wherein: 3. The device according to claim 1, wherein an upwardly facing dish-like projection is integrally formed on an outer periphery of the anchor member. 4. The adjusting ring (30) has two concentric grooves (3) in its upper region.
The device according to any one of claims 1 to 3, further comprising (5) and a latch unit. 5. Apparatus according to claim 1, wherein the upper frame member (1) comprises an outwardly extending anchor ring (15) substantially at the center of its outer periphery. . 6. An intermediate ring (9, 9a, 9b) mounted on the frame member (1).
6. An apparatus according to any of the preceding claims, characterized in that an intermediate ring (9, 9a, 9b) is provided with an outwardly extending anchor ring (29). 7. A bellows (4) between the connecting member (1) and the frame member (40).
7. A device according to claim 1, further comprising a flexible member in the form of a bellows, the bellows preferably comprising a stiffener (5) in a circumferential direction thereof. 8. The method according to claim 1, wherein the bellows is substantially an assembly of frustoconical parts, each of which is connected alternately in opposite directions. An apparatus according to any of the preceding claims. 9. Apparatus according to claim 1, wherein a steel ring (5) is mounted for reinforcement in each area where the diameter of the bellows (4) is greatest. 10. The device according to claim 1, wherein the anchor member, the connecting member and, if necessary, the adjusting ring are interconnected so as not to come apart. An apparatus according to any one of the above.